// vue.config.js
const path = require("path");

const resolve = dir => {
  return path.join(__dirname, dir);
};

const port = process.env.port || process.env.npm_config_port || 8099 

// 线上打包路径，请根据项目实际线上情况
const BASE_URL = process.env.NODE_ENV === "production" ? "/" : "/";

module.exports = {
  publicPath: BASE_URL,
  outputDir: "dist", // 打包生成的生产环境构建文件的目录
  assetsDir: "", // 放置生成的静态资源路径，默认在outputDir
  indexPath: "index.html", // 指定生成的 index.html 输入路径，默认outputDir
  pages: undefined, // 构建多页
  productionSourceMap: false, // 开启 生产环境的 source map
  chainWebpack: config => {
    // 配置路径别名
    config.resolve.alias
      .set("@", resolve("src"))
      .set("_c", resolve("src/components"));
    // set svg-sprite-loader
    config.module.rule('svg').exclude.add(resolve('src/icons')).end();
    config.module.rule('icons').test(/\.svg$/).include.add(resolve('src/icons')).end().use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end();
      config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
    // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )
    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
  },
    
  // 反向代理的配置
  devServer: {
    host: "192.168.0.236", // ip
    port: port, // 端口
    // proxy: {
    //   // change xxx-api/login => mock/login
    //   // detail: https://cli.vuejs.org/config/#devserver-proxy
    //   [process.env.VUE_APP_BASE_API]: {
    //     target: `http://127.0.0.1:${port}/mock`,
    //     changeOrigin: true,
    //     pathRewrite: {
    //       ['^' + process.env.VUE_APP_BASE_API]: ''
    //     }
    //   }
    // },
  }
};

